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Page title Columbia Suicide Severity Rating Scale (C-SSRS) Main page contentThe Columbia Suicide Severity Rating Scale (C-SSRS) is a short questionnaire that can be administered quickly in the field by responders with no formal mental health training, and it is relevant in a wide range of settings and for individuals of all ages. The website provides information about the C-SSRS, also known as the Columbia Protocol, including the history of its development and how it can be used.